Expandable document bag

ABSTRACT

An expandable document bag comprises a boxing casing; the box casing having a lower plate; a left lateral plate and a right lateral plate; an interior of the box casing being formed with a receiving space; each of the left lateral plate and right lateral plate having an inserting post; the lower plate being elastic; and the lower plate having two sliding slots at positions corresponding to the two inserting posts, each sliding slot being capable of receiving a respective inserting post; the inserting posts being slidable within the sliding slots. The lower plate is elastic and thus is expandable so as to adjust a size of the receiving space. The box casing is installed with at least one receiving bag for receiving documents or other objects.

FIELD OF THE INVENTION

The present invention relates to document bags, and particular to a expandable document bag, wherein by the interactions of the sliding slots of the lower plate and the inserting posts of the right lateral plate and left lateral plate, the space of the box casing is expandable and reducible. Thus the documents are restored in a proper space.

BACKGROUND OF THE INVENTION

In the prior art, the document receiving bag is mainly made by plastic material. The bag is a box with an upper cover. The left, right and lower surfaces of the box are bent and are elastic. When more documents are received within the box casing, the front and rear sides of the box casing will expand for receiving more documents, and then the upper cover covers upon an opening of the bag.

The prior art expands for receiving more objects therein by expanding bending portions thereof. Thus, the expansion extent is finite. If too many documents are received, the bag will deform. If the bag is in a deforming state, it will be destroyed. Maybe the user carries more document bags to receive more documents, but this will increase the cost and make inconvenience to the users.

SUMMARY OF THE INVENTION

Accordingly, the primary object of the present invention is to provide an expandable document bag, wherein by the interactions of the sliding slots of the lower plate and the inserting posts of the right lateral plate and left lateral plate, the space of the box casing is expandable and reducible. Thus the documents are restored in a proper space.

To achieve above objects, the present invention provides an expandable document bag. The expandable document bag comprises a boxing casing; the box casing having a lower plate; a left lateral plate and a right lateral plate; an interior of the box casing being formed with a receiving space; each of the left lateral plate and right lateral plate having an inserting post; the lower plate being elastic; and the lower plate having two sliding slots at positions corresponding to the two inserting posts, each sliding slot being capable of receiving a respective inserting post; the inserting posts being slidable within the sliding slots. The lower plate is elastic and thus is expandable so as to adjust a size of the receiving space. The box casing is installed with at least one receiving bag for receiving documents or other objects.

The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the expandable document bag of the present invention, wherein the upper cover is opened.

FIG. 2 is a perspective view of the expandable document bag of the present invention, wherein the upper cover is closed.

FIG. 3 is a schematic view showing the operation of the lower plate of the present invention.

FIG. 4 is a schematic view about the application of the expandable document bag of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

In order that those skilled in the art can further understand the present invention, a description will be described in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.

The present invention is related to an expandable document bag, wherein the expandable document bag comprises a box casing 1. The box casing 1 is formed by a bottom plate 10, an upper cover 11, a left lateral plate 12, a right lateral plate 13 and a lower plate 14. The upper cover 11, left lateral plate 12 and right lateral plate 13 are connected by a slightly compressible bending portion 15 and the bottom plate 10. Each of the left lateral plate 12 and the right lateral plate 13 has one inserting post 16 thereon.

The lower cover 14 is formed with two sliding slots 17 corresponding to the two inserting posts 16. A plurality of receiving bags 18 are formed on the bottom plate 10 at an inner side of the box casing 1. The receiving bags 18 serves to receiving smaller documents and related materials. By opening and closing the box casing 1 by using upper cover 11, objects in the receiving bags can be taken out.

Referencing to FIGS. 3 and 4, inserting posts 16 installed on the left lateral plate 12 and right lateral plate 13 of the box casing 1 in the expandable document bag of the present invention are pivotally installed to the sliding slots 17 of the lower plate 14. The inserting posts 16 are movable and slidable along the sliding slots 17. In a normal condition, the lower plate 14 is affected by the elastic force itself, and thus moves toward the bottom plate 10. At this moment, the inserting posts 16 are at a bottom side of the sliding slots 17. The receiving space between the bottom plate 10 and the lower plate 14 is smaller and thus when more documents are received within the box casing 1, the lower plate 14 will be pushed outwards due to an external force from the documents within the bottom plate 10. Then the inserting posts 16 on the left lateral plate 12 and right lateral plate 13 will slide to higher positions of the sliding slots 17. Because the lower plate 14 is elastic, it is only pushed outwards to a thickness for receiving the documents. Namely, when more documents in the box casing 1 is received, the inserting posts 16 of the right lateral plate 13 and left lateral plate 12 will slide upwards to a great extent. As a result, the lower plate 14 expands outwards greatly. Thus, a larger space is formed between the lower plate 14 and the bottom plate 10 for receiving documents and the bending portion 15 expands therewith. On the contrary, when less documents are disposed in the box casing 1, the lower plate 14 will reduce inwards due to the elasticity itself so that the inserting posts 16 of the left lateral plate 12 and right lateral plate 13 will slide downwards to reduce the receiving space between the lower plate 14 and the bottom plate 10. By the interactions of the sliding slots 17 of the lower plate 14 and the inserting posts 16 of the right lateral plate 13 and left lateral plate 12, the space of the box casing 1 is expandable and reducible. Thus the documents are restored in a proper space.

The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims. 

1. An expandable document bag comprising a boxing casing; the box casing having a lower plate; a left lateral plate and a right lateral plate; an interior of the boxing casing being formed with a receiving space; each of the left lateral plate and right lateral plate having an inserting post; the lower plate being elastic; and the lower plate having two sliding slots at positions corresponding to the two inserting posts, each sliding slot being capable of receiving a respective inserting post; the inserting posts being slidable within the sliding slots; wherein the lower plate is elastic and thus is expandable so as to adjust a size of the receiving space.
 2. The expandable document bag as claimed in claim 1, wherein the box casing is installed with at least one receiving bag for receiving documents or other objects.
 3. An expandable document bag comprising a box casing; the box casing being formed by a bottom plate, an upper cover, a left lateral plate, a right lateral plate and a lower plate; the upper cover, left lateral plate and right lateral plate being connected by a slightly compressible bending portion and the bottom plate; a plurality of receiving bags being formed on the bottom plate at an inner side of the box casing; the receiving bags serving for receiving smaller documents and related materials; by opening and closing the box casing by using upper cover, objects in the receiving bags can be taken out; each of the left lateral plate and right lateral plate having an inserting post; the lower plate being elastic; and the lower plate having two sliding slots at positions corresponding to the two inserting posts, each sliding slot being capable of receiving a respective inserting post; the inserting posts being slidable within the sliding slots; wherein the lower plate is elastic and thus is expandable so as to adjust a size of the receiving space. 